Ideographic: A constant 亘 heart 忄; 亘 also provides the pronunciationRadical:

meaning for héng:

  • - permanent
  • - constant
  • - fixed
  • - usual
  • - ordinary
  • - rule (old)
  • - one of the 64 hexagrams of the Book of Changes (䷟)eternal
  • - everlasting
  • - fig. to pass into eternity (i.e. to die)(fixed) starto pursue unremittingly (idiom)
  • - to persevereconservation (e.g. of energy, momentum or heat in physics)
  • - to remain constant (of a number)constant